This is my current favorite app for sharing lists of links. I don't know why's it's so hard to find an app for this purpose that is well-designed and has good mobile apps. My only problem is with the firefox extension. Sometimes the "drag to dropmark" icon will show up on the right side of a webpage when I wasn't trying to drag anything... and it doesn't always go away. Sometimes I have to reload the page to get it to go away. Also - and I know this is something that's not so easy to accomplish - the website screenshots are not always what I'd want them to be. Certain sites have a main product image for that page and sometimes Dropmark just uses a page screenshot. I'm sure they'll get that down in time! Thanks for your hard work!

Edit 05/01/2019: One year later nothing was done to fix or improve this addon. As it was my main interaction with Dropmark, I sadly cancelled my account and moved to an alternative.
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Original message: One very annoying pattern with this addon is the post-event validation. Once I click add to dropmark, I should have the window closed by the same operation if the request was valid. I feel like I click twice ok in a row, which is annoying when you save dozens of links a day.